Display device and driving method thereof

Abstract

A display device, includes: a scan driver configured to sequentially supply scan signals having a turn-on level to the first scan line and the second scan line during a first period and to concurrently supply scan signals having a turn-on level to the first scan line and the second scan line during a second period after the first period, wherein: a mask period corresponds to a difference between a start point of the second period and a start point of the first period in a next frame period, a first frame period and a second frame period have different mask periods, a third frame period between the first frame period and the second frame period has a same mask period as the first frame period, and a fourth frame period between the first frame period and the second frame period has a same mask period as the second frame period.

What is claimed is: 
     
       1. A display device, comprising:
 pixels; and 
 a data driver configured to supply data voltages corresponding to grayscale values of a frame to the pixels during a first period and to supply a data voltage corresponding to a mask grayscale to the pixels during a second period after the first period, 
 wherein: 
 a mask period corresponds to a difference between a start point of the second period and a start point of the first period in a next frame period, 
 a first frame period and a second frame period have different mask periods, 
 a third frame period between the first frame period and the second frame period has a same mask period as the first frame period, and 
 a fourth frame period between the third frame period and the second frame period has a same mask period as the second frame period. 
 
     
     
       2. The display device according to  claim 1 , further comprising:
 a scan driver configured to sequentially supply scan signals having a turn-on level to a first scan line and a second scan line during the first period and to concurrently supply scan signals having a turn-on level to the first scan line and the second scan line during the second period. 
 
     
     
       3. The display device according to  claim 2 , wherein:
 each frame period includes an image display period and the mask period, and 
 the image display period corresponds to a difference between a start point of the first period and a start point of the second period in one frame period. 
 
     
     
       4. The display device according to  claim 2 , further comprising:
 a scan start signal generator configured to supply a first scan start pulse, corresponding to a start point of the first period, and a second scan start pulse, corresponding to a start point of the second period, to the scan driver. 
 
     
     
       5. The display device according to  claim 4 , wherein:
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period is different from that in the second frame period, 
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the third frame period is equal to that in the first frame period, and 
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the fourth frame period is equal to that in the second frame period. 
 
     
     
       6. The display device according to  claim 2 ,
 wherein the pixels comprise: 
 a first pixel coupled to the first scan line and a data line; and 
 a second pixel coupled to the second scan line and the data line. 
 
     
     
       7. The display device according to  claim 6 ,
 wherein the pixels further comprise: 
 a third pixel coupled to a third scan line and the data line; and 
 a fourth pixel coupled to a fourth scan line and the data line, 
 wherein:
 the scan driver is configured to supply a scan signal having a turn-on level to the third scan line during a third period and to supply a scan signal having a turn-on level to the fourth scan line during a fourth period, and 
 the first period, the third period, the second period, and the fourth period are sequentially located in a frame period. 
 
 
     
     
       8. The display device according to  claim 7 , wherein the first period is longer than each of the second period, the third period, and the fourth period. 
     
     
       9. The display device according to  claim 8 , wherein the second period, the third period, and the fourth period have a same length. 
     
     
       10. The display device according to  claim 2 , wherein a number of scan signals having the turn-on level and output from the scan driver during the second period in the first frame period is equal to a number of scan signals having the turn-on level and output from the scan driver during the second period in the second frame period. 
     
     
       11. A method of driving a display device including a data driver and pixels, the method comprising:
 supplying, by the data driver, data voltages corresponding to grayscale values of a frame to the pixels during a first period of each frame period, and 
 supplying, by the data driver, a data voltage corresponding to a mask grayscale to the pixels during a second period of each frame period, 
 wherein: 
 a mask period corresponds to a difference between a start point of the second period and a start point of the first period in a next frame period, 
 a first frame period and a second frame period have different mask periods, 
 a third frame period between the first frame period and the second frame period has a same mask period as the first frame period, and 
 a fourth frame period between the third frame period and the second frame period has a same mask period as the second frame period. 
 
     
     
       12. The method according to  claim 11 , further comprising:
 sequentially supplying, by a scan driver, scan signals having a turn-on level to a first scan line and a second scan line during the first period, and 
 concurrently supplying, by the scan driver, scan signals having a turn-on level to the first scan line and the second scan line during the second period. 
 
     
     
       13. The method according to  claim 12 , further comprising:
 supplying a first scan start pulse, corresponding to a start point of the first period, and a second scan start pulse, corresponding to a start point of the second period, to the scan driver. 
 
     
     
       14. The method according to  claim 13 , wherein:
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the first frame period is different from that in the second frame period, 
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the third frame period is equal to that in the first frame period, and 
 an interval between a time at which the first scan start pulse is generated and a time at which the second scan start pulse is generated in the fourth frame period is equal to that in the second frame period. 
 
     
     
       15. The method according to  claim 12 ,
 wherein the pixels comprise: 
 a first pixel coupled to the first scan line and a data line; and 
 a second pixel coupled to the second scan line and the data line. 
 
     
     
       16. The method according to  claim 15 , wherein:
 the pixels further comprise a third pixel coupled to a third scan line and the data line; and a fourth pixel coupled to a fourth scan line and the data line, and 
 the method further comprises supplying, by the scan driver, a scan signal having a turn-on level to the third scan line during a third period and supplies a scan signal having a turn-on level to the fourth scan line during a fourth period, wherein 
 the first period, the third period, the second period, and the fourth period are sequentially located in a frame period. 
 
     
     
       17. The method according to  claim 16 , wherein the first period is longer than each of the second period, the third period, and the fourth period. 
     
     
       18. The method according to  claim 17 , wherein the second period, the third period, and the fourth period have a same length. 
     
     
       19. The method according to  claim 12 , wherein a number of scan signals having the turn-on level and output from the scan driver during the second period in the first frame period is equal to a number of scan signals having the turn-on level and output from the scan driver during the second period in the second frame period.